242 citations · 2.1k across the 39 of their papers we have counts for
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Induced gravitational waves as a cosmological probe of the sound speed during the QCD phase transition
Katsuya T. Abe, Yuichiro Tada, Ikumi Ueda
The standard model of particle physics is known to be intriguingly successful. However their rich phenomena represented by the phase transitions (PTs) have not been completely unde…
Local observer effect on the cosmological soft theorem
Teruaki Suyama, Yuichiro Tada, Masahide Yamaguchi
Non-Gaussianities of primordial perturbations in the soft limit provide the important information about the light degrees of freedom during inflation. The soft modes of the curvatu…
A manifestly covariant theory of multifield stochastic inflation in phase space: solving the discretisation ambiguity in stochastic inflation
Lucas Pinol, Sébastien Renaux-Petel, Yuichiro Tada
Stochastic inflation is an effective theory describing the super-Hubble, coarse-grained, scalar fields driving inflation, by a set of Langevin equations. We previously highlighted…
Conformal inflation in the metric-affine geometry
Yusuke Mikura, Yuichiro Tada, Shuichiro Yokoyama
Systematic understanding for classes of inflationary models is investigated from the viewpoint of the local conformal symmetry and the slightly broken global symmetry in the framew…
Escape from the swamp with spectator
Kazuhiro Kogai, Yuichiro Tada
In the context of string theory, several conjectural conditions have been proposed for low energy effective field theories not to be in swampland, the UV-incomplete class. The rece…